// 带参宏定义

#include <stdio.h>
#define MAX(a,b) (a > b) ? a : b
#define SQ(a) a * a

int main(){
    int x = 10, y = 20;
    int max = MAX(x, y);
    printf("%d\n", max);

    int i = 9;
    printf("%d\n", SQ(i));




    return 0;
}